The Twin Ackerman Sisters (FINISHED)

Luna and older twin sister Mikasa are going through tough times sense the incident when they were little. (It happened when they were 6/7 years old. They witnessed the whole thing. But luna can't keep it off your mind. She has nightmares about it every couple days until that all goes away when she joins the Survey Corps. (Or if you are picky Scout Regiment) and when she meets the Humanity's Strongest. (P.S. Humanity's strongest is mine so back off XD)